Make it possible to choose whether or not to watch configuration files specified using the "log4net.Config" appsetting key

Details

Description

Currently (v1.2.10) it is possible to specify a configuration file for log4net by adding a key like this in the host application's configuration <appSettings> section:
<add key="log4net.Config" value="Log.config" />

This defaults to invoking XmlConfigurator.Configure() on the file specified (log4net/Core/DefaultRepositorySelector.cs, line 725). This means the file is not watched for changes during program run time.

It would be nice if there was some way similar to the above <appSettings> key to specify whether log4net should watch the file or not.

I might propose that a new key is introduced in this fashion:
<add key="log4net.Config.Watch" value="true" />

This key would denote a bool value defaulting to false. The value would only be taken into consideration if the "log4net.Config" key is specified.